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4 years ago

When you don't know the answer on a multiple-choice questions it is generally best to

Mathematics

2 answers:

In-s [12.5K]4 years ago

8 0

CRoss of what doesn't make sense then pick from leftover answers.

cluponka [151]4 years ago

5 0

When you don't know the answer on a multiple-choice questions it is generally best to guess a random answer instead of leaving it blank.
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Remi is building a triangular wooden shelving unit. The base measures 30 cm and the slant sides measure 18 cm and 24 cm. He want

tresset_1 [31]

Answer:

Remi needs 15 cm of wood to be cut for the shelf.

Step-by-step explanation:

We have drawn the triangle for your reference.

Now Given:

Base measure (BC) =30 cm

Slant height (AB) = 24 cm

Slant height (AC) = 18 cm

Also Given horizontal shelf halfway between the base and the top.

In the triangle drawn horizontal shelf is denoted by DE.

We need to find the measure of DE.

Now we know that horizontal shelf halfway between the base and the top.

Hence by Midpoint theorem which states that;

"The segment joining two sides of a triangle at the midpoints of those sides is parallel to the third side and is half the length of the third side."

$DE=\frac{1}{2}\times BC$

Substituting the value we get;

$DE = \frac{1}{2}\times 30 =15\ cm$

Hence Remi needs 15 cm of wood to be cut for the shelf.

5 0

3 years ago

An employer wishes to compare typing speeds of graduates from 2 different study programs: A and B. Eight random graduates from c

Karolina [17]

Answer:

Calculated value t = 0.614< 1.782

we accepted null hypothesis for 12 degrees of freedom at 0.05 level of significance .

Step-by-step explanation:

we will t-test t = x⁻- y⁻ /S√ n₁+n₂-2

Given An employer wishes to compare typing speeds of graduates from 2 different study programs: A and B

course A type at 62, 85, 59, 64, 73, 70, 75, and 72

mean of x is x⁻ = ∑x / n

mean of x = 62+85+59+64+73+70+75+ 72 /8 = 70

x⁻ = 70

course B type at 75, 64, 81, 55, 69, and 58

mean of y is y⁻ = ∑y / n = 75+64+81+55+69+ 58/6 = 67

y⁻ =67

course A course B

x y x- x⁻ (x-x⁻ )^2 y- y⁻ (y-y⁻ )^2

62 75 8 64 8 64

85 64 15 225 -3 9

59 81 -11 121 14 196

64 55 -6 36 -12 144

73 69 3 9 2 4

70 58 0 0 -9 81

75 5 25

72 2 4

∑( (x-x⁻ )^2= 484 ∑( (y-y⁻ )^2= 498

Adding ∑( (x-x⁻ )^2+ ∑( (y-y⁻ )^2= 982

n₁+n₂-2 = 8+6-2=12

now S^2 = 982/ 12 =81.833

Null hypothesis :H₀:μ₁=μ₂ ( there is no difference between A and B)

Alternative hypothesis :H₁:μ₁≠μ₂

level of significance ∝=0.05

we will use t-test t = 0.614 ( see attachment )

The degrees of freedom = n₁+n₂-2 = 8+6-2=12

From tabulated value t = 1.782

Calculated value t = 0.614< 1.782

we accepted null hypothesis for 12 degrees of freedom at 0.05 level of significance .

There is no difference between Course A and Course B

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8 0

3 years ago

Using function notation, create a transformation of the parent function, f(x) = x ,

Sonbull [250]

f(x)=(anything greater than 1)x+2

6 0

3 years ago

Below are five number sequences.

oksian1 [2.3K]

Answer:

Step-by-step explanation:

3 0

3 years ago

An amusement park sells 5 bottles of water for every

77julia77 [94]

Answer:

8 bottles of juice

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3 years ago

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